We have a problem with a PowerConnect M6348 that is inside a PowerEdge M1000e. On the web interface of the PE M1000e the following warning is displayed "A link tuning failure detected on IO module A2".
Unfortunately due to the software running on it and the location of the PowerEdge M1000e we can't perform a firmware update.
Re: PowerEdge M1000e problem with PowerConnect M6348
If the firmware is old, then getting the firmware up to date is the first recommended action to take. Until you are able to update the firmware, you can try power cycling and reseating the module. Sometimes that can help with these warnings.